i hope it is pretty balanced though
that was what made the first one good for a while

If anything it'll be more balanced. Things got out of hand with the original and the ability have secondary professions--it was just too difficult to balance the sheer number of combinations of skills. GW2 will not have secondary professions.

They do have differences. Each class has abilities which other classes can benefit from.

IE the mage guy can cast fire walls, then the ARcher can shoot through the wall and get flaming arrows for more dmg.

I am SO glad a AAA backed game like this is showing that you don't need the "Trinity" setup to make an mmo. I am so damn tired of that, along with the boring auto-attack combat and special spam while standing there facing enemies and taking the hits.

I understand that there will be some synergy between classes, but there still needs to be some basic roles to be played in combat--balance, if you will: offense, defense, and support. If every class can do everything... it kind of makes any one class feel less important in the team dynamic.